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I’m using JExcelApi for generating XLS files. From jxl.format.Colour, I see how to get any of the colors in the “standard Excel colour palette”, but not how to create a new color (say, given its RGB).
But in Excel itself, I can pick any color at all.
Am I just missing it? Is there a way in JExcelApi to select an arbitrary color? I’m using a simple find-the-closest-standard-color method right now, which is OK but not great.
Excel versions before 2007 have a standard palette, and given that the API you are using does not support the 2007 format, you may be stuck with that. The reason you can choose any colour you want is probably because you are using a new version of Excel.
See this information on the Microsoft site.
I don’t see how you could override the standard colour palette in the API you are using, but in Apache POI (which also lets you write Excel files) you can: see this link. Basically, what you need to do there is: assign certain standard colours (green, etc) to your cells; then override these colours with whatever custom colour you need.